A new semi-fragile watermarking algorithm for image authentication  

作　　者：韩德志 

机构地区：[1]Department of Computer Science, Jinan University, Guangzhou 510632, P.R.China College of Computer Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, P.R. China

出　　处：《Journal of Chongqing University》2005年第1期41-46,共6页重庆大学学报（英文版）

基　　金：Supported by Hi-Tech R&D 863 Program of China (No. 20021111901010) and Scientific Research Fund of Hunan Provincial Education Department (No. 03A033)

摘　　要：This paper presents a new semi-fragile watermarking algorithm for image authentication which extracts image features from the low frequency domain to generate two watermarks: one for classifying of the intentional content modification and the other for indicating the modified location. The algorithm provides an effective mechanism for image authentication. The watermark generation and watermark embedment are disposed in the image itself, and the received image authentication needs no information about the original image or watermark. The algorithm increases watermark security and prevents forged watermark. Experimental results show that the algorithm can identify intentional content modification and incidental tampering, and also indicate the location where a modification takes place.This paper presents a new semi-fragile watermarking algorithm for image authentication which extracts image features from the low frequency domain to generate two watermarks: one for classifying of the intentional content modification and the other for indicating the modified location. The algorithm provides an effective mechanism for image authentication. The watermark generation and watermark embedment are disposed in the image itself, and the received image authentication needs no information about the original image or watermark. The algorithm increases watermark security and prevents forged watermark. Experimental results show that the algorithm can identify intentional content modification and incidental tampering, and also indicate the location where a modification takes place.

关 键 词：AUTHENTICATION semi-fragile watermarking FRAGILITY wavelet transform 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]